Bogie & Car Characterization, Vibration and Fatigue System

For each bogie, there are two axle/wheelset 6DOF excitation tables with 6DOF load cells mounted in line with the wheel platform.

1. Specimen Interface
2. Longitudinal Actuator (x2)
3. Restraint Struts
4. Hydraulic Service Manifold
5. Static Support
6. Vertical Actuators (x4)
7. Module Base Plate
8. Lateral Actuator
9. 6DOF Load Transducer (x2)
10. Loading Table

Note: These numbers are typical results of the full calibration of the sensors. They are not guaranteed specifications, but are to be used for uncertainty analyses, with appropriate use of coverage factors as needed.   Errors may be higher than specified for moment loads above calibrated range

1. Root-sum-of-squares for Non-Linearity, Hysteresis, and Non-repeatability, and Estimated Span Shift
2. Estimated Span Shift from Fixture Boundary Condition Changes
3. Deviation from a straight line through zero
4. Deviation between equivalent load points for ascending and descending data on a single load cycle
5. 6x6 or 6x8 linear cross-coupling matrix may be necessary to achieve these estimates

The 4DOF active loading/reaction frame simulates car body motion and load to the bogie, or it can be used as a fixed reaction for primary and secondary suspension tests.

Motion Capabilities:

• Vertical
• Lateral
• Roll
• Yaw